When to Call: Construction Phases for Commercial Trade Sales

1. Why timing matters more than list quality

Most trade contractors think the value of a permit feed is "more leads." That's wrong. The value is timing. A construction project goes through 8-12 distinct phases, and your trade gets hired during exactly one of them. Reach out too early, the GC tells you "we haven't picked subs yet, call back in two months." Reach out too late, every sub is already locked in.

This guide maps every commercial trade to its calling window, with rough timeline estimates from permit issue.

2. The 8 construction phases

For a typical $500K-$2M commercial tenant improvement or new build:

(Timelines compress dramatically for restaurant fit-outs — often 8-12 weeks total — and stretch for institutional builds.)

3. Trade-by-trade calling windows

3.1. Demolition

Window: Phase 1, weeks 0-2. Why now: demo is usually first on-site. If the GC hasn't picked a demo crew at permit-issue, they will within days. What to say: "We can mobilize for {address} permit BP{number} within 5 business days."

3.2. Bin Rental + Hauling

Window: Phase 1-2, weeks 0-4, with re-engagement weeks 8-12. Why: bins are needed throughout demo, but rotation accelerates during framing waste-out. What to say: "Need bins on-site for BP{number}? We can drop a 30-yard tomorrow."

3.3. Excavation / Foundation

Window: Phase 2-3, weeks 1-6 (new builds only). Why: sequence-critical — earthwork has to finish before foundations can pour. Re-call: if a permit shows new-build status >6 weeks old and the excavator isn't yet on-site, the GC has a problem you can solve.

3.4. Structural Steel / Framing

Window: Phase 3-4, weeks 4-10. Why: structural is on the critical path — late framing delays everything. What to say: "Lead time for {member type} steel from our shop is 4 weeks; if you're starting framing in week 8, we should talk now."

3.5. HVAC + Mechanical

Window: Phase 5, weeks 6-14 (frame inspection). Why: HVAC ducting goes in after frame inspection passes but before drywall — you have a 2-3 week window. What to say: "We saw your frame inspection coming up on {address}. Want us to walk the site for the HVAC rough-in scope?"

3.6. Electrical

Window: Phase 5, weeks 6-12. Sub-trade electrical permit is often visible in open data before the parent permit moves to rough-in, giving you a 2-3 week head start. What to say: "Saw the sub-permit posted for BP{number}. We do {service-feeder/low-voltage/fire-alarm} — different scope from your primary electrical. Worth a 5-min call?"

3.7. Plumbing + Gas

Window: Phase 5, weeks 6-12. Same as electrical. For restaurants specifically: grease-trap install is a separate sub-trade — call right at permit-issue, lead-time is long.

3.8. Drywall / Insulation

Window: Phase 6, weeks 10-16. Why: you go in after MEP rough-in passes inspection.

3.9. Flooring / Millwork / Finishes

Window: Phase 7, weeks 14-22. Why: finishes go in late, but specification + ordering happens earlier. Reach out at week 8-10 to get specified into the package.

3.10. Roofing (Commercial Re-Roof)

Window: Separate from new-build cycle. Re-roof permits are standalone — call within 2 weeks of permit-issue, weather permitting.

3.11. Signage + Awnings

Window: Phase 7-8, weeks 18-24. Signage often goes in after the new business licence is issued, not after the building permit. Cross-reference both feeds.

3.12. Restaurant Equipment + Hospitality Fit-out

Window: Phase 1, weeks 0-4. Why: walk-in coolers, exhaust hoods, and prep kitchens have 6-10 week lead times. The GC orders them at permit-issue or earlier. If you're not on the spec sheet at week 0, you're not getting in.

3.13. Medical / Dental Equipment

Window: Phase 1-2 for build-in equipment (lead aprons, dental chair plumbing), Phase 7-8 for portable. Same principle: long lead, specify early.

3.14. Fire Alarm / Sprinkler / Life Safety

Window: Phase 5-6, weeks 8-14. Often a separate sub-trade permit. Visible early.

4. The cross-permit signals

When a parent permit issues, you can often anticipate when sub-trade permits will follow. Watch for:

• Sub-electrical posted 2-4 weeks after parent → MEP rough-in is imminent
• Sub-plumbing posted alongside sub-electrical → rough-in is starting
• Demolition permit closed on the parent property → framing can start
• Final inspection scheduled → drop your follow-up for any service/maintenance contract you want

5. The "second contact" rule

The biggest gap in most contractors' permit-based outreach is not following up at the right later phase. A permit you saw issued in March will need your trade in June. Most contractors call once and forget.

The right discipline:

1. Log every permit you reached out about, with date
2. Calendar the "actual calling window" based on the trade
3. Reach out again at the right phase, referencing your earlier call

Two-touch outreach converts at roughly 3-5× one-touch.

6. Phase signals from open data

Most municipalities publish inspection events alongside the permit. The inspection passed/failed status is a free phase signal:

• "Foundation inspection passed" → framing crews moving in
• "Framing inspection passed" → MEP rough-in window opens
• "Drywall inspection passed" → finishes window opens
• "Final inspection scheduled" → occupancy imminent

Shovel Radar's "when to call" column compresses all of this into a single phrase per row. The math is the same — you can do it yourself with the raw open-data fields if you'd rather build it in-house.

7. Further reading

• How to Read a Canadian Building Permit
• All trades — flagship feeds per trade